If vectors A and B are given by $A=5\widehat{i}+6\widehat{j}+3\widehat{k}andB=6\widehat{i}-2\widehat{j}-6\widehat{k}.$ Which  of the following  is /are correct?

Here, $A.B=(5\widehat{i}+6\widehat{j}+3\widehat{k}).(6\widehat{i}-2\widehat{j}-6\widehat{k})=0$

So, A is perpendicular to B and A is not equal to A × B, as cross product of two vectors in anticommutative. The magnitude of A is $\sqrt{70}andBis\sqrt{76}$